<p>Exchange emails with Microsoft Exchange Server work fine, but there's a bug in iOS 6.1 that drains resources when accepting meeting invites or anything that interacts with your Calendar.</p><p>"Devices using the latest Apple iOS 6.1 are consuming a large quantity of Exchange resources when a user responds to a meeting invitation or update from the iOS 6.1 device. The iOS 6.1 device continually retries a response command, which impacts the overall company email system as it consumes Exchange resources."</p><p>It doesn't break functionality but it could strain your corporate network a bit according to our source.</p><p>No fix from Apple about this yet, iOS 6.0 works fine and if necessary you can turn off Calendar hookups in the iPhone's Exchange settings for your account while its an issue (you can receive invites etc but they don't copy to the iOS Caldendar app).</p><p><a href="http://societyandreligion.com/tech/2013/03/exchange-issues-iphone-ios-61.html">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.thinkdigit.com/Mobiles-PDAs/Apple-rolls-out-iOS-613-to-solve_13946.html">Apple rolls out iOS 6.1.3 to solve lockscreen vulnerability</a> (Digit)</p><p><a href="http://www.gottabemobile.com/2013/03/19/ios-6-1-3-on-iphone-5-review-impressions-and-performance/">iOS 6.1.3 on iPhone 5 Review: Impressions and Performance</a> (Gotta Be Mobile)</p><p><a href="http://www.techradar.com/news/software/operating-systems/apple-finally-fixes-lockscreen-vulnerability-with-ios-6-1-3-release-1139098">Apple finally fixes lockscreen vulnerability with iOS 6.1.3 release</a> (TechRadar UK)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dmKbPDNTfODe7wM8oFlCCKdyGR98M&ned=us">141 additional articles.</a></p>